-/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- * \brief Device mode driver for the library USB CDC Class driver.
- *
- * Device mode driver for the library USB CDC Class driver.
- *
- * \note This file should not be included directly. It is automatically included as needed by the USB module driver
- * dispatch header located in LUFA/Drivers/USB.h.
- */
-
-/** \ingroup Group_USBClassCDC
- * \defgroup Group_USBClassCDCDevice CDC Class Device Mode Driver
- *
- * \section Sec_Dependencies Module Source Dependencies
- * The following files must be built with any user project that uses this module:
- * - LUFA/Drivers/USB/Class/Device/CDC.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
- *
- * \section Sec_ModDescription Module Description
- * Device Mode USB Class driver framework interface, for the CDC USB Class driver.
- *
- * \note There are several major drawbacks to the CDC-ACM standard USB class, however
- * it is very standardized and thus usually available as a built-in driver on
- * most platforms, and so is a better choice than a proprietary serial class.
- *
- * One major issue with CDC-ACM is that it requires two Interface descriptors,
- * which will upset most hosts when part of a multi-function "Composite" USB
- * device, as each interface will be loaded into a separate driver instance. To
- * combat this, you should use the "Interface Association Descriptor" addendum to
- * the USB standard which is available on most OSes when creating Composite devices.
- *
- * Another major oversight is that there is no mechanism for the host to notify the
- * device that there is a data sink on the host side ready to accept data. This
- * means that the device may try to send data while the host isn't listening, causing
- * lengthy blocking timeouts in the transmission routines. To combat this, it is
- * recommended that the virtual serial line DTR (Data Terminal Ready) be used where
- * possible to determine if a host application is ready for data.
- *
- * @{
- */
-
-#ifndef _CDC_CLASS_DEVICE_H_
-#define _CDC_CLASS_DEVICE_H_
-
- /* Includes: */
- #include "../../USB.h"
- #include "../Common/CDC.h"
-
- #include <stdio.h>
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
- /* Preprocessor Checks: */
- #if !defined(__INCLUDE_FROM_CDC_DRIVER)
- #error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Type Defines: */
- /** \brief CDC Class Device Mode Configuration and State Structure.
- *
- * Class state structure. An instance of this structure should be made for each CDC interface
- * within the user application, and passed to each of the CDC class driver functions as the
- * CDCInterfaceInfo parameter. This stores each CDC interface's configuration and state information.
- */
- typedef struct
- {
- const struct
- {
- uint8_t ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device. */
-
- uint8_t DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint. */
- uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint. */
- bool DataINEndpointDoubleBank; /**< Indicates if the CDC interface's IN data endpoint should use double banking. */
-
- uint8_t DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint. */
- uint16_t DataOUTEndpointSize; /**< Size in bytes of the CDC interface's OUT data endpoint. */
- bool DataOUTEndpointDoubleBank; /**< Indicates if the CDC interface's OUT data endpoint should use double banking. */
-
- uint8_t NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used. */
- uint16_t NotificationEndpointSize; /**< Size in bytes of the CDC interface's IN notification endpoint, if used. */
- bool NotificationEndpointDoubleBank; /**< Indicates if the CDC interface's notification endpoint should use double banking. */
- } Config; /**< Config data for the USB class interface within the device. All elements in this section
- * <b>must</b> be set or the interface will fail to enumerate and operate correctly.
- */
- struct
- {
- struct
- {
- uint16_t HostToDevice; /**< Control line states from the host to device, as a set of \c CDC_CONTROL_LINE_OUT_*
- * masks. This value is updated each time \ref CDC_Device_USBTask() is called.
- */
- uint16_t DeviceToHost; /**< Control line states from the device to host, as a set of \c CDC_CONTROL_LINE_IN_*
- * masks - to notify the host of changes to these values, call the
- * \ref CDC_Device_SendControlLineStateChange() function.
- */
- } ControlLineStates; /**< Current states of the virtual serial port's control lines between the device and host. */
-
- CDC_LineEncoding_t LineEncoding; /** Line encoding used in the virtual serial port, for the device's information.
- * This is generally only used if the virtual serial port data is to be
- * reconstructed on a physical UART.
- */
- } State; /**< State data for the USB class interface within the device. All elements in this section
- * are reset to their defaults when the interface is enumerated.
- */
- } USB_ClassInfo_CDC_Device_t;
-
- /* Function Prototypes: */
- /** Configures the endpoints of a given CDC interface, ready for use. This should be linked to the library
- * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing
- * the given CDC interface is selected.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- *
- * \return Boolean \c true if the endpoints were successfully configured, \c false otherwise.
- */
- bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Processes incoming control requests from the host, that are directed to the given CDC class interface. This should be
- * linked to the library \ref EVENT_USB_Device_ControlRequest() event.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- */
- void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** General management task for a given CDC class interface, required for the correct operation of the interface. This should
- * be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- */
- void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a
- * line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the
- * user program by declaring a handler function with the same name and parameters listed here. The new line encoding
- * settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- */
- void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a
- * control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the
- * user program by declaring a handler function with the same name and parameters listed here. The new control line states
- * are available in the State.ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as
- * a mask of CDC_CONTROL_LINE_OUT_* masks.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- */
- void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a send break request sent to the device from the host. This is generally used to separate
- * data or to indicate a special condition to the receiving device.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- * \param[in] Duration Duration of the break that has been sent by the host, in milliseconds.
- */
- void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- const uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Sends a given data buffer to the attached USB host, if connected. If a host is not connected when the function is
- * called, the string is discarded. Bytes will be queued for transmission to the host until either the endpoint bank
- * becomes full, or the \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows
- * for multiple bytes to be packed into a single endpoint packet, increasing data throughput.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- * \param[in] Buffer Pointer to a buffer containing the data to send to the device.
- * \param[in] Length Length of the data to send to the host.
- *
- * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
- */
- uint8_t CDC_Device_SendData(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- const char* const Buffer,
- const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
-
- /** Sends a given null terminated string to the attached USB host, if connected. If a host is not connected when
- * the function is called, the string is discarded. Bytes will be queued for transmission to the host until either
- * the endpoint bank becomes full, or the \ref CDC_Device_Flush() function is called to flush the pending data to
- * the host. This allows for multiple bytes to be packed into a single endpoint packet, increasing data throughput.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- * \param[in] String Pointer to the null terminated string to send to the host.
- *
- * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
- */
- uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- const char* const String) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
-
- /** Sends a given byte to the attached USB host, if connected. If a host is not connected when the function is called, the
- * byte is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the
- * \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
- * packed into a single endpoint packet, increasing data throughput.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- * \param[in] Data Byte of data to send to the host.
- *
- * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
- */
- uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Determines the number of bytes received by the CDC interface from the host, waiting to be read. This indicates the number
- * of bytes in the OUT endpoint bank only, and thus the number of calls to \ref CDC_Device_ReceiveByte() which are guaranteed to
- * succeed immediately. If multiple bytes are to be received, they should be buffered by the user application, as the endpoint
- * bank will not be released back to the USB controller until all bytes are read.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- *
- * \return Total number of buffered bytes received from the host.
- */
- uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function
- * returns a negative value. The \ref CDC_Device_BytesReceived() function may be queried in advance to determine how many
- * bytes are currently buffered in the CDC interface's data receive endpoint bank, and thus how many repeated calls to this
- * function which are guaranteed to succeed.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- *
- * \return Next received byte from the host, or a negative value if no data received.
- */
- int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- *
- * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
- */
- uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial
- * control lines (DCD, DSR, etc.) have changed states, or to give BREAK notifications to the host. Line states persist
- * until they are cleared via a second notification. This should be called each time the CDC class driver's
- * ControlLineStates.DeviceToHost value is updated to push the new states to the USB host.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- */
- void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Creates a standard character stream for the given CDC Device instance so that it can be used with all the regular
- * functions in the standard <stdio.h> library that accept a \c FILE stream as a destination (e.g. \c fprintf). The created
- * stream is bidirectional and can be used for both input and output functions.
- *
- * Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single
- * fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may
- * be used when the read data is processed byte-per-bye (via \c getc()) or when the user application will implement its own
- * line buffering.
- *
- * \note The created stream can be given as stdout if desired to direct the standard output from all <stdio.h> functions
- * to the given CDC interface.
- * \n\n
- *
- * \note This function is not available on all microcontroller architectures.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed.
- */
- void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
-
- /** Identical to \ref CDC_Device_CreateStream(), except that reads are blocking until the calling stream function terminates
- * the transfer. While blocking, the USB and CDC service tasks are called repeatedly to maintain USB communications.
- *
- * \note This function is not available on all microcontroller architectures.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
- * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed.
- */
- void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
-
- /* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- /* Function Prototypes: */
- #if defined(__INCLUDE_FROM_CDC_DEVICE_C)
- #if defined(FDEV_SETUP_STREAM)
- static int CDC_Device_putchar(char c,
- FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
- static int CDC_Device_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
- static int CDC_Device_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
- #endif
-
- void CDC_Device_Event_Stub(void) ATTR_CONST;
-
- void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
- void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
- void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
- const uint8_t Duration) ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1)
- ATTR_ALIAS(CDC_Device_Event_Stub);
- #endif
-
- #endif
-
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
- #endif
-
-#endif
-
-/** @} */
-
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